The ATH-M20 Closed-Back Dynamic Stereo Monitor Headphones from Audio-Technica have a circumaural and closed-back design that provides isolation while playing back audio at high volumes. They feature 40mm neodymium drivers and copper-clad aluminum wire voice coils. A cushioned, adjustable headband allows for comfort during extended use. Their single-sided, 10-foot coiled cable terminates in a 1/8" gold-plated stereo connector. A 1/4" snap-on adapter is included for additional compatibility.